[PATCH RFC V10 3/7] mm/mempolicy: Export memory policy symbols
From: Shivank Garg <hidden>
Date: 2025-08-11 09:08:30
Also in:
kvm, linux-coco, linux-fsdevel, linux-kselftest, linux-mm, lkml
Subsystem:
memory management, memory management - memory policy and migration, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
KVM guest_memfd wants to implement support for NUMA policies just like shmem already does using the shared policy infrastructure. As guest_memfd currently resides in KVM module code, we have to export the relevant symbols. In the future, guest_memfd might be moved to core-mm, at which point the symbols no longer would have to be exported. When/if that happens is still unclear. Acked-by: David Hildenbrand <redacted> Acked-by: Vlastimil Babka <redacted> Signed-off-by: Shivank Garg <redacted> --- mm/mempolicy.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index eb83cff7db8c..d385202306db 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c@@ -354,6 +354,7 @@ struct mempolicy *get_task_policy(struct task_struct *p) return &default_policy; } +EXPORT_SYMBOL_GPL_FOR_MODULES(get_task_policy, "kvm"); static const struct mempolicy_operations { int (*create)(struct mempolicy *pol, const nodemask_t *nodes);
@@ -487,6 +488,7 @@ void __mpol_put(struct mempolicy *pol) return; kmem_cache_free(policy_cache, pol); } +EXPORT_SYMBOL_GPL_FOR_MODULES(__mpol_put, "kvm"); static void mpol_rebind_default(struct mempolicy *pol, const nodemask_t *nodes) {
@@ -2885,6 +2887,7 @@ struct mempolicy *mpol_shared_policy_lookup(struct shared_policy *sp, read_unlock(&sp->lock); return pol; } +EXPORT_SYMBOL_GPL_FOR_MODULES(mpol_shared_policy_lookup, "kvm"); static void sp_free(struct sp_node *n) {
@@ -3170,6 +3173,7 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) mpol_put(mpol); /* drop our incoming ref on sb mpol */ } } +EXPORT_SYMBOL_GPL_FOR_MODULES(mpol_shared_policy_init, "kvm"); int mpol_set_shared_policy(struct shared_policy *sp, struct vm_area_struct *vma, struct mempolicy *pol)
@@ -3188,6 +3192,7 @@ int mpol_set_shared_policy(struct shared_policy *sp, sp_free(new); return err; } +EXPORT_SYMBOL_GPL_FOR_MODULES(mpol_set_shared_policy, "kvm"); /* Free a backing policy store on inode delete. */ void mpol_free_shared_policy(struct shared_policy *sp)
@@ -3206,6 +3211,7 @@ void mpol_free_shared_policy(struct shared_policy *sp) } write_unlock(&sp->lock); } +EXPORT_SYMBOL_GPL_FOR_MODULES(mpol_free_shared_policy, "kvm"); #ifdef CONFIG_NUMA_BALANCING static int __initdata numabalancing_override;
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2.43.0